I got a VC Stardance LP circa 2000. It's currently installed with a flexible SS vent snaked through a larger B-vent (I believe it's a 4" inside a 6" b-vent). The 4" flex pipe is connected directly to the flue collar. It goes up about 3 feet, 90 degrees into a very old (like 1870's old) sandstone chimney, 90 degrees up the sandstone chimney, and then out the top of the chimney (outside). Total chimney height is about 26 feet. We don't use this thing 'cause I don't trust it, as it's not installed per the manual. Specifically, the manual requires the use of a "draft hood adapter" for nautral vent installation. If I'm reading than manual correctly, this thing shuts off the gas in a down draft situation to prevent CO from entering the room and killing me and everyone else in the house - it appears to be wired to the gas valve in the manual. Unfortunately, I cannot find one of these things anywhere, apparently due to the closure/change of ownership in VC. I am not a gas appliance expert, so I don't know if this draft hood adapter is absolutely necessary...can the stove be operated safely without it, or is there a retrofit/aftermarket device that could be used in place of the original VC part if it is absolutely required?